<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>

  <body>
    <div id="app">
      <div>
        <span>姓名:</span>
        <input type="text" v-model="name" />
      </div>
      <div>
        <span>年龄:</span>
        <input type="number" v-model="age" />
      </div>
      <div>
        <span>性别:</span>
        <select v-model="gender">
          <option value="男">男</option>
          <option value="女">女</option>
        </select>
      </div>
      <div>
        <button @click="change">添加/修改</button>
      </div>
      <div>
        <table border="1" cellpadding="10" cellspacing="0">
          <tr>
            <th>序号</th>
            <th>姓名</th>
            <th>年龄</th>
            <th>性别</th>
            <th>操作</th>
          </tr>
          <tr v-for="(item,index) in list" :key="item.id">
            <td>{{index+1}}</td>
            <td>{{item.name}}</td>
            <td>{{item.age}}</td>
            <td>{{item.sex}}</td>
            <td>
              <button @click="del(item.id)">删除</button>
              <button @click="edit(item.id)">编辑</button>
            </td>
          </tr>
        </table>
      </div>
    </div>
    <script src="./vue.js"></script>
    <script>
      const app = new Vue({
        el: "#app",
        data: {
          name: "",
          age: "",
          gender: "男",
          isEdit: false,
          isEditId: "",
          list: [
            { id: 1001, name: "Tom", age: "19", sex: "男" },
            { id: 1002, name: "Jone", age: "21", sex: "女" },
            { id: 1003, name: "张三", age: "22", sex: "男" },
          ],
        },
        methods: {
          edit(id) {
            const info = this.list.find((item) => item.id == id);
            (this.isEditId = info.id),
              (this.name = info.name),
              (this.age = info.age),
              (this.gender = info.sex),
              (this.isEdit = true);
          },
          change() {
            if (this.name.trim() == "") return alert("请输入姓名");
            if (this.age.trim() == "") return alert("请输入年龄");
            if (this.isEdit === true) {
              const apple = this.list.filter(
                (item) => item.id == this.isEditId
              );
              (apple[0].name = this.name), (apple[0].age = this.age);
              (apple[0].sex = this.gender), (this.name = ""), (this.age = "");
            } else {
              this.isEdit = false;
              this.list.push({
                id: +new Date(),
                name: this.name,
                age: this.age,
                sex: this.gender,
              });
              (this.name = ""), (this.age = "");
            }
          },
          del(id) {
            this.list = this.list.filter((item) => item.id !== id);
            this.isEdit = false;
          },
        },
      });
    </script>
  </body>
</html>
